Limits of computation | Quantum information theory

No-teleportation theorem

In quantum information theory, the no-teleportation theorem states that an arbitrary quantum state cannot be converted into a sequence of classical bits (or even an infinite number of such bits); nor can such bits be used to reconstruct the original state, thus "teleporting" it by merely moving classical bits around. Put another way, it states that the unit of quantum information, the qubit, cannot be exactly, precisely converted into classical information bits. This should not be confused with quantum teleportation, which does allow a quantum state to be destroyed in one location, and an exact replica to be created at a different location. In crude terms, the no-teleportation theorem stems from the Heisenberg uncertainty principle and the EPR paradox: although a qubit can be imagined to be a specific direction on the Bloch sphere, that direction cannot be measured precisely, for the general case ; if it could, the results of that measurement would be describable with words, i.e. classical information. The no-teleportation theorem is implied by the no-cloning theorem: if it were possible to convert a qubit into classical bits, then a qubit would be easy to copy (since classical bits are trivially copyable). (Wikipedia).

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From playlist Find the Asymptotes of Rational Functions

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From playlist Set Theory by Mathoma

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From playlist Kaapi With Kuriosity (A Monthly Public Lecture Series)

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From playlist Holes and Asymptotes of Rational Functions

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From playlist 2017 - T3 - Analysis in Quantum Information Theory - CEB Trimester

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Related pages

EPR paradox | Quantum channel | Density matrix | Quantum entanglement | Qubit | Quantum teleportation | Measurement in quantum mechanics | Quantum information | No-go theorem | Bloch sphere | No-deleting theorem | Bit | No-cloning theorem | No-communication theorem